Demo: Understanding the PRL
Instruction Level: Introductory
6 MINUTE DEMO: Patients with macular disease and central scotomas must use a peripheral, preferred retinal locus (PRL) in place of their damaged retina. This presentation will define what the PRL is and detail the findings of microperimeter studies to explain the development of the PRL including where patients place their PRL, the use of multiple PRLs and the relationship between the PRL and stability of fixation. This presentation will also provide information to clinicians on how to assess and measure the PRL and fixation stability in patients with central vision loss and how poor fixation stability and poor use of the PRL impacts on activities of daily living
1. Characterize the PRL (development, placement and the factors that can lead to the use of multiple PRLs).
2. Define fixation stability and the methods used to quantify fixation stability (bivariate contour ellipses and kernel density estimator).
3. Determine how to clinically assess and measure the PRL and fixation stability and its importance to rehabilitation of patients with central vision loss.